I'm in the midst of an engine swap in a 1951 Power Wagon. As the title says, it is getting a 351W out of a 77 F250. I have removed the front of the engine for cleaning and will be replacing with a modern serpentine setup. The truck right now has a passenger side outlet for the lower radiator hose and as it is a relatively rare truck getting a new radiator is unfortunately not an option. Is there any reverse rotation water pumps with a passenger side inlet? I noticed that it would likely block my timing marks, but I should be able to get a driver side timing pointer from an earlier block correct?

thanks